[linux-block.git] / io_uring / poll.h

// SPDX-License-Identifier: GPL-2.0

#include <linux/io_uring_types.h>

#define IO_POLL_ALLOC_CACHE_MAX 32

enum {
	IO_APOLL_OK,
	IO_APOLL_ABORTED,
	IO_APOLL_READY
};

struct io_poll {
	struct file			*file;
	struct wait_queue_head		*head;
	__poll_t			events;
	int				retries;
	struct wait_queue_entry		wait;
};

struct async_poll {
	struct io_poll		poll;
	struct io_poll		*double_poll;
};

/*
 * Must only be called inside issue_flags & IO_URING_F_MULTISHOT, or
 * potentially other cases where we already "own" this poll request.
 */
static inline void io_poll_multishot_retry(struct io_kiocb *req)
{
	atomic_inc(&req->poll_refs);
}

int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);

int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);

struct io_cancel_data;
int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
		   unsigned issue_flags);
int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
bool io_poll_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
			bool cancel_all);

void io_poll_task_func(struct io_kiocb *req, io_tw_token_t tw);
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	#include <linux/io_uring_types.h>
	4
	5	#define IO_POLL_ALLOC_CACHE_MAX 32
	6
	7	enum {
	8	IO_APOLL_OK,
	9	IO_APOLL_ABORTED,
	10	IO_APOLL_READY
	11	};
	12
	13	struct io_poll {
	14	struct file *file;
	15	struct wait_queue_head *head;
	16	__poll_t events;
	17	int retries;
	18	struct wait_queue_entry wait;
	19	};
	20
	21	struct async_poll {
	22	struct io_poll poll;
	23	struct io_poll *double_poll;
	24	};
	25
	26	/*
	27	* Must only be called inside issue_flags & IO_URING_F_MULTISHOT, or
	28	* potentially other cases where we already "own" this poll request.
	29	*/
	30	static inline void io_poll_multishot_retry(struct io_kiocb *req)
	31	{
	32	atomic_inc(&req->poll_refs);
	33	}
	34
	35	int io_poll_add_prep(struct io_kiocb req, const struct io_uring_sqe sqe);
	36	int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
	37
	38	int io_poll_remove_prep(struct io_kiocb req, const struct io_uring_sqe sqe);
	39	int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
	40
	41	struct io_cancel_data;
	42	int io_poll_cancel(struct io_ring_ctx ctx, struct io_cancel_data cd,
	43	unsigned issue_flags);
	44	int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
	45	bool io_poll_remove_all(struct io_ring_ctx ctx, struct io_uring_task tctx,
	46	bool cancel_all);
	47
	48	void io_poll_task_func(struct io_kiocb *req, io_tw_token_t tw);